JPS5718190A - Start signal switching circuit - Google Patents

Start signal switching circuit

Info

Publication number
JPS5718190A
JPS5718190A JP9263680A JP9263680A JPS5718190A JP S5718190 A JPS5718190 A JP S5718190A JP 9263680 A JP9263680 A JP 9263680A JP 9263680 A JP9263680 A JP 9263680A JP S5718190 A JPS5718190 A JP S5718190A
Authority
JP
Japan
Prior art keywords
start signal
switching circuit
lead wires
circuit
controlled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9263680A
Other languages
Japanese (ja)
Inventor
Ayafumi Komatsu
Yuichi Morikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP9263680A priority Critical patent/JPS5718190A/en
Publication of JPS5718190A publication Critical patent/JPS5718190A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Feedback Control In General (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:To elevate the stability of a switching circuit, by providing a differentiating circuit on each start signal system from a multiple control device, inverting and holding its differentiated output by an FF, and driving a common device to be controlled, by AND of its start signal and an output data of the control device. CONSTITUTION:A start signal from lead wires 4, 5 of the respective control devices 1, 2 of ''0'' system and ''1'' system of a multiple constitution is selected by AND gates 19, 20, whether it coincides with an output data from lead wires 6, 7 or not is discriminated, the signal is changed over by an OR gate 21, and a device to be controlled is driven. This start signal switching circuit is provided with a differentiating a start signal from the respective lead wires 4, 5, waveform shaping gates 16, 17, and an FF circuit 18 for inverting and holding a differentiated output of the circuit 15. The device to be controlled 3 is driven by AND of the start signal and an output data from the lead wires 6, 7, and even if a start signal of one of the control devices 1, 2 has been stacked, operation of the switching circuit is made stable without exerting influence on other start signal system.
JP9263680A 1980-07-09 1980-07-09 Start signal switching circuit Pending JPS5718190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9263680A JPS5718190A (en) 1980-07-09 1980-07-09 Start signal switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9263680A JPS5718190A (en) 1980-07-09 1980-07-09 Start signal switching circuit

Publications (1)

Publication Number Publication Date
JPS5718190A true JPS5718190A (en) 1982-01-29

Family

ID=14059925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9263680A Pending JPS5718190A (en) 1980-07-09 1980-07-09 Start signal switching circuit

Country Status (1)

Country Link
JP (1) JPS5718190A (en)

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